Sodium Metabisulfite

About

The Sodium Metabisulfite collection at BVV features high-purity technical and food-grade powders, engineered for critical reducing and antioxidant applications. In the specialized field of precious metal refining, Sodium Metabisulfite is the premier selective precipitant, used to efficiently "drop" dissolved gold from Aqua Regia solutions into a high-purity metallic powder. Beyond refining, this versatile inorganic salt is a powerful dechlorination agent for water treatment and an essential antioxidant in botanical processing to prevent oxidation and preserve product integrity. BVV provides scalable inventory to support both boutique refining shops and large-scale industrial facilities, with packaging ranging from individual jars and cases to bulk 50lb bags and full pallets. Centrally located in Glendale Heights, Illinois, we ensure your operation stays productive with rapid, compliant shipping and full technical documentation. .collection-faq details { border-bottom: 1px solid #E0E0E0; padding: 20px 0; } .collection-faq details summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; font-size: 1.2em; font-weight: bold; margin: 0; } .collection-faq details summary::-webkit-details-marker { display: none; } .collection-faq details summary::after { content: ''; width: 30px; height: 30px; background-image: url('https://cdn.shopify.com/s/files/1/0078/8814/2451/files/BVV_CIRCLE_PNG_430x.png?v=1765373021'); background-size: contain; background-repeat: no-repeat; transition: transform 0.3s ease; flex-shrink: 0; margin-left: 15px; } .collection-faq details[open] summary::after { transform: rotate(180deg); } .collection-faq details p { margin-top: 15px; line-height: 1.6; font-size: 1em; color: #333; } How is Sodium Metabisulfite used to refine gold? In the refining process, Sodium Metabisulfite acts as a reducing agent. When added to a filtered Aqua Regia solution containing dissolved gold, it reduces the gold ions int